A simple way to complement full-color micro-light-emitting diode (micro-LED) displays is to employ ultraviolet or blue micro-LEDs with quantum dot (QD) converters. A pixel frame is essential for precisely locating the QD converter on a micro-LED chip and to limit the optical cross-talk effect. The limitations of pixel frames prepared by the commonly-used lithography technique, such as shallow depth and high dependence on high-transmittance substrates, have not been resolved in previous studies. In this study, we propose a magnetic-vibration composite stamping (MVCS) process to prepare a high-aspect-ratio and high-transmittance QD pixel frame. Magnetic extinction particles were employed, regulated, and converged into the wall of the pixel frame under the combined function of magnetic and vibration fields. Compared with the pixel frame prepared by the traditional stamping process, the pixelated QD converter achieved a 4.5-fold increase in the maximum photoluminescence intensity. Combining the micro-LED and pixelated QD converters in the pixel frame prepared by MVCS provides an alternative and practical approach for full-color micro-LED displays.

补充全彩色微型发光二极管 (micro-LED) 显示器的一种简单方法是使用带有量子点 (QD) 转换器的紫外线或蓝色微型 LED。像素框架对于在 micro-LED 芯片上精确定位 QD 转换器和限制光学串扰效应至关重要。常用的光刻技术制备的像素帧的局限性，如深度浅和对高透光率基板的依赖性高，在以往的研究中尚未得到解决。在这项研究中，我们提出了一种磁振动复合冲压 (MVCS) 工艺来制备高纵横比和高透射率的 QD 像素框架。在磁场和振动场的共同作用下，磁性消光粒子被使用、调节并会聚到像素框架的壁中。与传统冲压工艺制备的像素框相比，像素化QD转换器的最大光致发光强度提高了4.5倍。在 MVCS 准备的像素框架中结合微型 LED 和像素化 QD 转换器，为全彩色微型 LED 显示器提供了一种替代和实用的方法。